How to understand and learn `instrument` package of java?

Recently, I fou开发者_开发知识库nd there is a java.lang.instrument package in jdk, which is used by many frameworks to reload classes or profile.

I don't find many articles of using them, is there any resource(book, article, project) to help to understand it?

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I think this link can help to understand a little the usage of java agents:

• Not So Secret Java Agent (1)
• Not So Secret Java Agent (2)
• Not So Secret Java Agent (3)
• Not So Secret Java Agent (4)

hope this will help

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This library is for Java Instrumentation mechanism (Registering a class as MBean server) using JMX. Refer JMX guide